Alameda County property record for 4136 Omega Ave, Castro Valley, CA 94546
| Property Type | Single Family Home |
|---|---|
| Details | 3 bd · 2 ba · 1,340 sqft · built 1986 |
| Lot Size | 0.117 acres (5,111 sqft) |
| Owner | 2 Individual Names on File |
| Last Sale | $390,000 (Mar 2009) |
| Tax Bill | $6,712 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 84C-707-18 |
| Primary APN | 84C-707-18 |
|---|---|
| Alternative APN |
|
| Bedrooms | 3 Beds |
|---|---|
| Full Baths | 2 Baths |
| Total Rooms | 5 Rooms |
| Stories | 1 Story |
| Building Area | 1,340 sqft Living Area |
| Year Built | Built 1986 |
|---|---|
| Effective Year Built | Effective 1986 |
| Architectural Style | L-Shape |
| Construction Type | Wood |
| Lot Area | 5,111 sqft (0.117 acres) |
| Parking Spaces | 2 Parking Spaces |
| Street Address | 4136 OMEGA AVE |
|---|---|
| City | CASTRO VALLEY |
| State | CA |
| Zip | 94546-4539 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | LOT: 0000B BLK: PM: 0102 PAGE: 0055 |
| Jurisdiction | ALAMEDA CA |
| Township / Civil Division | HAYWARD |
| Census Block Group | 1 |
| Census Block | 1000 |
| Census Tract | 430800 |
4136 Omega Ave is owned and occupied by two individuals who bought it in March 2009.
Source: Alameda County records, as of August 5, 2026
| Owner of Record | 2 Individual Names on File |
|---|---|
| Mailing Address | 4136 OMEGA AVE, CASTRO VALLEY, CA 94546-4539 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Vesting | Joint Tenants |
Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.
| Deed Names | 2 Names on Deed |
|---|---|
| Last Sale | Mar 11, 2009 · Amount on File |
| Deed Sale | Mar 11, 2009 · Amount on File |
| Prior Sale | Dec 12, 2008 · Amount on File |
| Deed Document Number | 200971034 |
| Prior Transfer Date | Jun 18, 2001 |
| Prior Transfer Doc | 0000257185 |
| Record Updated | Oct 29, 2026 |
The 2025 property tax bill for 4136 Omega Ave was $6,712 with a homeowner's exemption.
Source: Alameda County assessment roll, as of August 5, 2026
| Type | Name |
|---|---|
| State | California |
| County | Alameda County |
| Unified School District | Castro Valley Unified School District (KG - 12) |
| Year | Tax Bill | Assessed Value | Assessed Market Value |
|---|---|---|---|
| 2026 | $505,233 (+0.61%) Land $153,670 Building $358,563 | ||
| 2025 | $6,712.00 Homeowner's exemption | $502,190 Land $150,657 Building $351,533 | |
| 2023 | $6,442.00 Homeowner's exemption | $482,694 Land $144,808 Building $337,886 | $840,240 |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
FEMA maps place 4136 Omega Ave in Zone X, an area of minimal flood risk.
Source: FEMA National Flood Hazard Layer, effective May 25, 2026
| FEMA Flood Zone | Zone X minimal risk |
|---|---|
| Flood Insurance Requirement | Not required lenders may require it |
Values are read at the parcel center point; lenders make the official flood determination.
Wildfire risk around 4136 Omega Ave is low, with less than a 0.01% annual chance of wildfire.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Low lower than 93% of the US · lower than 96% of California |
|---|---|
| Wildfire Likelihood | Under 0.01% annual chance |
| Exposure | None beyond ember reach |
Values cover an area roughly 900 ft across, not the parcel itself; insurers use their own ratings.
Source: EPA Safe Drinking Water Information System, as of September 2026
| Water System | EAST BAY MUD serves 1,468,000 people · EPA ID CA0110005 |
|---|---|
| Water Source | Surface water |
| Last State Inspection | Dec 2021 |
| Lead | Under 1 ppb (2022–2024) action level 15 ppb |
| Water Quality | None last 10 years |
|---|---|
| Treatment and Procedure | None last 10 years |
| Monitoring and Reporting | None last 3 years |
Results are for the whole water system, not water tested at this address; lead at the tap also depends on the building's own pipes. This system sells water to local utilities; the supplier billing this address may be one of them.
Source: FCC Broadband Data Collection, based on 704 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Sonic Telecom Fiber | 10,000 / 10,000 |
| AT&T Fiber · DSL · Fixed Wireless in parts of the area | 5,000 / 5,000 |
| Xfinity Cable | 2,000 / 250 |
| Verizon Fixed Wireless | 300 / 20 |
| Starlink Satellite | 280 / 30 |
| Etheric Networks Fixed Wireless | 250 / 100 |
| T-Mobile Fixed Wireless | 100 / 20 |
May also be available: GeoLinks.
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